3.5 Image Optimisation
(Trim Adjustment)
Vignetting is when the image
appears darker towards one
edge. This effect can be easily
corrected by adjusting the trim
control. To adjust the trim
control, loosen the clamp screw
on the underside of the Optosplit
II by a quarter of a turn in order to
free the slider which controls the
trim control. Gently move the
slider until the vignetting is eliminated. If the slider is moved too far
then the vignetting will become apparent on the other image and will
need to be adjusted in the opposite direction until both images are the
same intensity. It is important to remember to re-tighten the clamp
screw once the adjustment is complete.
If the Optosplit II has been configured into single channel (non-split
mode) (see section 3.6) and Trim adjustment is required to compensate
for vignetting being observed, it is likely the slider will need to be at
the extreme of its range of movement to either end.
TRIM
Clamp Screw
Vignetting is a darkening of the image
towards one edge.
Trim Controller
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